Dangerous Heat and Humidity Building from the Plains to the East Coast

A strengthening ridge of high pressure will produce much above average temperatures from the Plains to the East Coast, a true summer heat wave. Highs in the 90s and triple digits combined w/ humidity and dewpoints surging into the upper 70s, if not low 80s, will create heat indices as high as 110 to 115 through this weekend. Air quality will likely be poor due to haze and little air circulation.
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Last Update: 314 AM CDT Thu Jul 18 2019

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Chicago, IL Local Forecast Office

8NM ESE Chicago IL

Marine Zone Forecast

Today
South winds 10 to 15 kt becoming southeast 10 to 20 kt in the late morning, then becoming southwest late in the afternoon. Occasional gusts to 25 kt. Showers and thunderstorms likely through the day. Waves 1 ft or less building to 2 to 3 ft this morning.
Tonight
Southwest winds 10 to 20 kt. Slight chance of showers and thunderstorms through the night. Waves 1 to 3 ft.
Friday
Southwest winds 15 to 20 kt. Mostly sunny. Waves 1 to 3 ft.
Friday Night
Southwest winds 10 to 20 kt. Slight chance of showers and thunderstorms through the night. Waves 1 to 3 ft.
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Last Update: 314 AM CDT Thu Jul 18 2019
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